Film rewinder



NOV. 24, 1936. SERRURlER 2,062,016

FILM REWINDER Filed April 20, 1956 5 91014 161517 7 iii 9' 3 211 0 2e 0 31 32 37 31- E i 5 26 INVENTOR W ATTORNEYS Patented Nov. 24, 1936 UNITED STATES PATENT OFFICE Iwan Bermrier, Les Angela, Calif. Application April :0, 1m. Berlal No. mm

s Claims. (01. 242-455) This invention relates to motion picture film rewinders for use in editing film, measuring film,

etc., and has particularly to do with multiple rewinders for simultaneously-rewindingtwo separate films on two separate reels. Multiple rewinders are particularly useful in connection with the synchronizing of sound films with their assothrough a differential member so that equal torque is applied to each reel. with fittings for adapting the mechanism for use with a single reel and maintaining positive drive to that reel. This is quite an essential feature as it is well known that in a conventionahdiiferential mechanism if no load is placed on ene'bf the differentially driven members that member will rotate and prevent the application of driving torque to the other member. Various other specific objects and features the invention will become apparent from the detailed description which refers to the drawing. It is to be understood,-however, that while a specific embodiment of the invention is described for purposes of illustration, various departures can be made from the specific structure shown while still employing the essential features of the invention and the invention is therefore to be limited-only to the extent set forth in the claims. In the drawing:

Fig. 1 is a vertical sectional view through a rewinder in accordance with. the invention;

Fig. 2 is a detailed sectional view illustrating one method of adapting the machine for use with a single reel; 1 i

Fig. 3 is a detailed sectional view illustrating a second method of adapting the machine for use with a single reel; and

Figs. 4, 5 and 6 are perspective views of various fittings employed for adapting the machine for the various modes of'operation illustrated in'Figs. 1,2and3.

Referring to Fig. 1, my machine comprises a main casing l which also serves as a supporting framework for the rest of the mechanism. frame I is provided with a. base 2 and is adapted to be screwed or otherwise secured-to a work bench-or-table. The frame i comprises in addition a pair of parallel oppositely disposed end walls 3 and 4, respectively, which have formed integrally therewith journals 5, 0, I and I for supporting various rotating elements of the 5 machine.

Thus the Journal I rotatably supports a sleeve 8 which extends completely through the journal I and projects therebeyond both interior and exterior of the casing, On that portion project- 10 ing within the casing is mounted a spur gear ill which is keyed to the sleeve. The'gear ll rides-against the inner end of the journal I. To maintain the sleeve 8 and gear I. against longitudinal motion with respect to the journal I, a bushing II is secured as Ms set screw l2 to that end portion of the sleeve 9 projecting outwardly of the casing. It will be observed. therefore, that the sleeve 3 having the gear l0 anchored thereto is free to rotate .within the journal] but is prevented from'moving longitudinally with respect thereto.

Journaled within the sleeve I is a reel shaft ll, this shaft extending through and beyond the sleeve 8 at both ends and being rotatably supported at itsrightend in the journall of the casing I. Shaft-i4 has pinned thereto a spur gear I5 and the shaft is held againstlongitudlnal movement bya bushing i6 "and a bushing ll. Bushing l6 encircles the shaft and abuts against the gear IS on one'end sleeve 8 on the otherend. The bushing ll likewise encircles the shaft andis positioned between the sear IEand the inner end of'the journal I.

As shown in Fig. 1, the spur gears III and I5 are not engaged with anyother' gears and are free to rotate. Therefore, both the sleeve 9 and the shaft I are perfectly free to. rotate in the condition shownif However, a diflerential mechanism employinga pair (if spur gears 20 and 2| 40 adapted to be meshed with the gears ill and i5,

respectively. jis mounted within the case I below the'shait II for applying torque independently to shaft Ilan'd the'sleeve 9E Thegears 20 and' 2l fare supported for free rotation upona drive 22 which is rotatably supported inthe journals 5 andijin the end'walls s and 4 titheous n A'cr'ahk handle a is provided-on theriglit 'end-ofshaft =22 exterior of the casing l for-rotatingthe latter. 1 Gear "has 5 attached thereto abevel gear 24 and gear II. has attached thereto a bevel gear 25. These bevel gearsfland 25 meshwith diflerential bevel gears 26 which; are freely rotatahly on} stub shafts 21 tion.

shaft 2: and projecting from a frame member a which is pinned to shaft 22. The assembly com prising gears 20 and 24 is maintained in proper spaced relation with respect to the gears 26 by a bushing 28 surrounding the shaft 22 between the bevel gear 24 and the frame member 28 and a thrust block secured to shaft 22 and bearing against the outer end of gear 20. The assembly comprising the bevel gear 25 and the spingear II are similarly maintained in proper longitudinal position by a bushing II and a thrust member 22.

when the shaft 22 is in the position shown, the spur gears 20 and 2| are out of mesh with the gears in and II. However, by forcing the shaft 22 to the left the gear 20 meshes with the gear I0 and the gear 2| meshes with the gear ll, thereby operatively connecting the gear 20 to the sleeve 8 and the gear 2| to the shaft l4. Thereafter, rotation of shaft 22 by the crank 23 applies equal torques to the bevel gears 24 and 25 through the differential gears 26, which torques are transmitted through the gears 20 and 2|, respectively, to sleeve 0 and shaft ll, respectively. If the resistance to motion of either one of the elements I or I is greater than that of the other, then the differential gears 26 will rotate on the stub shafts 21 to cause the free member to rotate faster than the impeded member. I

The mechanism, described actuates two fllm reels I5 and 36, respectively, which are mounted upon that portion of the shaft l4 extending to the left of the casing I. Each reel 25, and 36 is of standard construction and comprises a pair of. end plates 31 extending outwardly from a cylindrical hub 38 upon which the films are wound. Each spool is also provided with an inner hub or spindle 38 which is dimensioned to fit about the shaft l4 and is provided with a groove or keyway III for receiving an element on the shaft II or bushing II for restraining free rotation of'the reel. ,Thus the bushing ,II is provided with a finger ll extending parallel to and adJacent the surface of the shaft Il for projecting into the groove III of reel 36 and thereby forcing the reel 8. The shaft l l,- on with a-wire key 41 II to rotate with the sleeve the other hand, is provided which projects from the surface of the shaft it into the groove 40 of reel toforce' the latter to rotate with the shaft ll. The outer end portion 48 of the shaft I may be pivotally secured totheremainder of theshaft as by pin 48 to permit the portion to-be turned at right angles togthe remainder of the shaft,

- shown in dotted lines, to maintain the reels 3a and" in place upon the shaft. A bushing"- may be positioned between reels l5 and to maintain them in proper spaced relation with respect to each other. This bushing 41 is vided with a groove 40 therein topermitthe bushing to move into place past the key N. Y The bushing 41 isshown inpe1'spectivein Flg.6.'

WiththemachineassetupinFlg. 1,elther reel 35 or "maybespunin either direction inde-. pendent of the other by virtue of the fact that neitherofthe'gears llor liismeshedwiththe driving mechanism. On the other hand, by

merelypushingthehandle 2Iintowardthecase l of-the machine androtatingthe driving torque may be appiiedto both reels to maintaintheiihnsbeingrewound intaut' condi- Occasionally it may he -desired to employ machine shown in Fig. 1 with only onereelfor g a single mm. 'iheapparatus as let bushing ll,

. reduced size bushing;ll.

but-many and various up in Fig. 1 would be unsuitable for this purpose since rotation of the handle 23 would rotate only one reel, that is, the one not in use, and the reel having film thereon would remain stationary. In other words, in order to positively rotate either reel the sleeve I and the shaft ll must be locked together to rotate in unison. There are two ways of mounting a single reel on the shaft l4 and two methods of simultaneously interlocking the shaft I and the sleeve I. These two methods are shown in Figs. 2 and 3, respectively.

In Fig. 2 the outer reel it alone is employed and is locked to the shaft II in the same manner as is the reel 25 in'Fig. 1, that is, the key 42 of the shaft engages the groove ll of the reel. To perform the dual functions of locking the sleeve 8 to the shaft II and of spacing the reel I! from the bushing H, a bushing is employed. This bushing is provided with a groove 5| which extends from one end to the other and slips over the tongue II on the bushing II at one end and slips vover the key 42 ion the shaft I4 at the other end, thereby preventing relative rotation between the bushing ii and the shaft l4.

In-the arrangement shownin Fig. 3 the single reel employed is positioned adjacent the case, the reel It occupying exactl'ythe same position as shown in Fig. 1. However, in this case the reel fliseliminatedandtospacethereelflfromthe outer end of the shaft H and to interlock the andthe shaft against relative rotatlonran auxiliary bushing i3 is employed. This bushing has a groove or keyway 64 extending therethrough," which groove is engaged by the key 42 on shaft ll to-prevent relative rotation of the bushing with respect to the shaft. To. prevent relative rotation between the bushing "and the bushing 53 is provided with a ngue extending from one end thereof, which ongue is ,-extended marine, rgroove rotation with respect-tothe bushing]! I on that member, there can be Ind-relative rotation between the bushings;i land.:.l.l. I'br conveniencethebushing ltisshownmadeintwo'pleees,

piece-i1 ingeneral dimensions and shapeto the bushing II exceptthatit is of at one end and the other piece conduced endof i1 and be place bya'set ss. ss is identical with Aspreviousiy the-invention has been described with referenceto -a construction whichhas been found to-be satisfactory modifications can bemade in the particular structure shown and the invention is therefore to be limited'only as set forth in-the appendedclaims.

-I claim:--

1. A film rewinder of the type described. comprising a casing member including a wall having a Journal therein, a-hollow sleeve member-rotat? ably supported in said journal and projecting. therefrom .into said,=08 $1ng,.member, a shaft member journalled in said, sleeve member for rotation with respect thereto and projecting a substantial distance thereberond interior and exterior' of said casing,- driving means coupled to said-sleeve andshaft within said casing forap-.

plying to each irrespective of the relative speeds of said sleeve. andushaft, a pair ofon said shaft and having grooves in the walls of said apertures, said reels being mounted on said shaft one adjacent said casing and the other adjacent the outer end of the shaft, a tongue on said sleeve member extending outwardly adiacent the surface of said shaft into the said groove in the adjacent reel to force the latter to rotate with the sleeve, and a key member on said shaft extending radially from the shaft into the said groove in the outer reel to cause the latter to rotate with said shaft.

2. A film rewlnder of the type described, comprising a casing member having spaced apart walls and juxtaposed journals therein, a hollow sleeve member rotatably supported in one of said journals and projecting therefrom into said casing member, a shaft member joumaled in said sleeve member for rotation with respect thereto, said shaft member extending through said casing and being journaled in said juxtaposed journal in the other wall, said shaft also projecting a substantial distance beyond said sleeve exterior of said casing, driving means coupled to said sleeve and shaft within said casing for applying torque to said sleeve and shaft irrespective of their relative speeds of rotation, a pair of film reels having axial apertures dimensioned to fit on said shaft and having grooves in the walls of said apertures, said reels being mounted on said shaft one adjacent said casing and the other adjacent the outer end of said shaft, a tongue on said sleeve member extending outwardly adjacent the surface of said shaft into said groove in the adjacent reel to cause the latter to rotate with the sleeve, and a key member on said shaft extending radially from the shaft into the said groove in the outer reel to cause the latter to rotate with said shaft.

3. A film rewlnder asdescribed in claim 2 including a drive shaft parallel to said one shaft with a frame fixed to said drive shaft, said frame taining said spur gear members in predetermined spaced apart relation with respect to each other and said frame member, and spur gears on said sleeve and said first mentioned shaft member, respectively, adapted to mesh with said two spur gears on said drive shaft. i

4. A' film rewlnder as described in claim including a drive shaft parallel to said one shaft with a frame fixed to said drive shaft, said frame having bevel gears mounted thereon for free rotation about axes extending radially from said drive shaft, a pair of spur gears freely rotatably mounted on said drive shaft on opposite sides of said frame, a bevel gear on the inner side of each of said first mentioned spur gears, thrust bearing members on said drive shaft for maintaining said spur gear members inpredetermined spaced apart relation with respect to each other and said frame member, and spur gears on said sleeve and said first mentioned shaft member, respectively, adapted to mesh with said two spur gears on said drive shaft, said drive shaft being longitudinally slidably mounted on its journals in said casing for movement to carry said spur gears thereon into and out of mesh with the associated spur gears on said sleeve members and said first mentioned shaft, respectively.

5. A film rewinding machine of the type described comprising a casing, a sleeve journaled in a wall of said casing and projecting therethrough, a shaft journaled in said sleeve and projecting therebeyond a substantial distance, a reel having an aperture therein dimensioned to fit snugly ,over said shaft, the axial length of said reel being less than half the length of the projecting portion of said shaft, means on the outer end of said shaft for preventing escape of a reel positioned thereon, means within said casing for simultaneously applying torque independently to said sleeve and said shaft, a tongue on said sleeve extending outwardly therefrom parallel to and closely adjacent the surface of said shaft, a key projecting from said shaft over a distance along said shaft, said reel having a groove therein for engaging said key and preventing relative rotation between the reel and shaft, and a bushing adapted to be mounted on said shaft between said sleeve and said reel for spacing the reel from said sleeve, said bushing having a groove therein dimensioned to receive said tongue and to receive said key on said shaft, thelatter being so positioned longitudinally on said shaft as to be engaged over part of its length by the groove in said bushing and over another part of its length by the groove in said reel.

6. A film rewinding machine comprising a cas- I ing having a wall with a journal therein, a hollow sleeve rotatably supported in said ioumal and extending from the interior to the exterior of said casing, a shaft. rotatably supported within said sleeve and extending therebeyond both within and without the casing, differential means within said casing for simultaneously applying qual torque to said shaft and said sleeve, said sleeve having a tongue extending therefrom exterior of the casing parallel to and alongside the surface of said shaft, a film reel apertured to fit on said shaft and of axial length less than half the length of the protruding portion of said shaft, a groove in said reel for receiving said tongue and locking the reel against rotation with respect to said sleeve, a key on said shaft positioned adjacent the outer end thereof, stop means on the outer end of said shaft, and a bushing for spacing said reel from the outer end of said shaft and preventing relative rotation between said sleeve and shaft, said bushing being apertured to fit over said shaft and having a groove therein for receiving the key on said shaft and said bushing also having a tongue on its inner end adapted to DISCLAIMER 2,062,016.' Iwaa Serrunler, Los

eles', Calif. FILM .Rnwmnnn.

Patent dated November 24,1936. Disclaimer filed June 6, 19 38, by the patentce. Herelg enters this disclaimer to claims 1 and 2 in said specification.

[ fiicial Gazette June 28, 1988.]

on said shaft and having grooves in the walls of said apertures, said reels being mounted on said shaft one adjacent said casing and the other adjacent the outer end of the shaft, a tongue on said sleeve member extending outwardly adiacent the surface of said shaft into the said groove in the adjacent reel to force the latter to rotate with the sleeve, and a key member on said shaft extending radially from the shaft into the said groove in the outer reel to cause the latter to rotate with said shaft.

2. A film rewlnder of the type described, comprising a casing member having spaced apart walls and juxtaposed journals therein, a hollow sleeve member rotatably supported in one of said journals and projecting therefrom into said casing member, a shaft member joumaled in said sleeve member for rotation with respect thereto, said shaft member extending through said casing and being journaled in said juxtaposed journal in the other wall, said shaft also projecting a substantial distance beyond said sleeve exterior of said casing, driving means coupled to said sleeve and shaft within said casing for applying torque to said sleeve and shaft irrespective of their relative speeds of rotation, a pair of film reels having axial apertures dimensioned to fit on said shaft and having grooves in the walls of said apertures, said reels being mounted on said shaft one adjacent said casing and the other adjacent the outer end of said shaft, a tongue on said sleeve member extending outwardly adjacent the surface of said shaft into said groove in the adjacent reel to cause the latter to rotate with the sleeve, and a key member on said shaft extending radially from the shaft into the said groove in the outer reel to cause the latter to rotate with said shaft.

3. A film rewlnder asdescribed in claim 2 including a drive shaft parallel to said one shaft with a frame fixed to said drive shaft, said frame taining said spur gear members in predetermined spaced apart relation with respect to each other and said frame member, and spur gears on said sleeve and said first mentioned shaft member, respectively, adapted to mesh with said two spur gears on said drive shaft. i

4. A' film rewlnder as described in claim including a drive shaft parallel to said one shaft with a frame fixed to said drive shaft, said frame having bevel gears mounted thereon for free rotation about axes extending radially from said drive shaft, a pair of spur gears freely rotatably mounted on said drive shaft on opposite sides of said frame, a bevel gear on the inner side of each of said first mentioned spur gears, thrust bearing members on said drive shaft for maintaining said spur gear members inpredetermined spaced apart relation with respect to each other and said frame member, and spur gears on said sleeve and said first mentioned shaft member, respectively, adapted to mesh with said two spur gears on said drive shaft, said drive shaft being longitudinally slidably mounted on its journals in said casing for movement to carry said spur gears thereon into and out of mesh with the associated spur gears on said sleeve members and said first mentioned shaft, respectively.

5. A film rewinding machine of the type described comprising a casing, a sleeve journaled in a wall of said casing and projecting therethrough, a shaft journaled in said sleeve and projecting therebeyond a substantial distance, a reel having an aperture therein dimensioned to fit snugly ,over said shaft, the axial length of said reel being less than half the length of the projecting portion of said shaft, means on the outer end of said shaft for preventing escape of a reel positioned thereon, means within said casing for simultaneously applying torque independently to said sleeve and said shaft, a tongue on said sleeve extending outwardly therefrom parallel to and closely adjacent the surface of said shaft, a key projecting from said shaft over a distance along said shaft, said reel having a groove therein for engaging said key and preventing relative rotation between the reel and shaft, and a bushing adapted to be mounted on said shaft between said sleeve and said reel for spacing the reel from said sleeve, said bushing having a groove therein dimensioned to receive said tongue and to receive said key on said shaft, thelatter being so positioned longitudinally on said shaft as to be engaged over part of its length by the groove in said bushing and over another part of its length by the groove in said reel.

6. A film rewinding machine comprising a cas- I ing having a wall with a journal therein, a hollow sleeve rotatably supported in said ioumal and extending from the interior to the exterior of said casing, a shaft. rotatably supported within said sleeve and extending therebeyond both within and without the casing, differential means within said casing for simultaneously applying qual torque to said shaft and said sleeve, said sleeve having a tongue extending therefrom exterior of the casing parallel to and alongside the surface of said shaft, a film reel apertured to fit on said shaft and of axial length less than half the length of the protruding portion of said shaft, a groove in said reel for receiving said tongue and locking the reel against rotation with respect to said sleeve, a key on said shaft positioned adjacent the outer end thereof, stop means on the outer end of said shaft, and a bushing for spacing said reel from the outer end of said shaft and preventing relative rotation between said sleeve and shaft, said bushing being apertured to fit over said shaft and having a groove therein for receiving the key on said shaft and said bushing also having a tongue on its inner end adapted to DISCLAIMER 2,062,016.' Iwaa Serrunler, Los

eles', Calif. FILM .Rnwmnnn.

Patent dated November 24,1936. Disclaimer filed June 6, 19 38, by the patentce. Herelg enters this disclaimer to claims 1 and 2 in said specification.

[ fiicial Gazette June 28, 1988.] 

